First line because 4(2a+1)=8a+4 and 9a+4-(8a+4)= a
Second line because a times 2 =2a and 2a+1-2a=1
<span>Although the second equality is more or less obvious since 2a+1 leaves a remainder of 1 when divided by a.</span>
Answer:
I think the scale factor is 2.5
Step-by-step explanation:
because 20 divided by 8 is 2.5
Answer:
The answer is 5.534 x107km
Step-by-step explanation:
Answer:
11 weeks
Step-by-step explanation:
25 divided by 5 = 5
So she saves 5 dollars a week meaning 5 x 11 = 55
Answer:
Step-by-step explanation:
f(n)=64+6n
f(n-1)=64+6(n-1)=64+6n-6=f(n)-6
f(n-1)+6=f(n)
or f(n)-f(n-1)=6
